TeX Quellcode:

\begin{array}{rcl}\alpha + \beta + \gamma &=& \dfrac{2\pi}{3} +\dfrac{\pi}{6} +\pi \\\alpha + \beta + \gamma &=& 120^\circ +30^\circ +180^\circ \\\alpha + \beta + \gamma &=& 330^\circ \\\alpha + \beta + \gamma & < & 360^\circ \\\end{array}